Eminem lit up Chicago’s Grant Park while performing his top 10 single “Lighters” in front of 90,000 festivalgoers at Lollapalooza this weekend. He was joined by his Bad Meets Evil partner Royce Da 5’9” and Bruno Mars for the first time as the night sky was illuminated with cell phones and lighters. During Em’s headlining set, he also brought out Skylar Grey for “I Need a Doctor.” Catch the highlights below.